*{
    padding: 0;
    margin: 0;
}
body{
    background-color: #000;
    overflow: hidden;
}
canvas{
    /* border: 1px solid red ; */
    width: 100%;
}
.text{
    color: #fff;
    /* 字间距 */
    letter-spacing: 2px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
}